90 lines
3.3 KiB
Plaintext
90 lines
3.3 KiB
Plaintext
Overview
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========
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The SAI Demo application demonstrates complicated digital audio playback and record case. The demo provide these features below:
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1. Duplex audio transfer, record and playback at same time.
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2. Playback a 250 Hz sine wave data generated by CMSIS-DSP library. Also compute the fundamental frequency using Fast Fourier Transform with CMSIS-DSP library.
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3. Record a 5 seconds audio to sdcard with a FatFs system. After record, playback it. This feature may only existed in platform which support sdhc.
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Toolchain supported
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===================
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- Keil MDK 5.37
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- GCC ARM Embedded 10.3.1
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- MCUXpresso 11.6.0
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- IAR embedded Workbench 9.30.1
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Hardware requirements
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=====================
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- Mini/micro USB cable
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- EVK-MIMXRT1020 board
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- Personal Computer
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- Headphone
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Board settings
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==============
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Please insert the SDCARD into card slot(J15), make sure C28 is welded.
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Prepare the Demo
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================
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1. Connect a USB cable between the host PC and the OpenSDA USB port on the target board.
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2. Open a serial terminal with the following settings:
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- 115200 baud rate
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- 8 data bits
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- No parity
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- One stop bit
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- No flow control
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3. Download the program to the target board.
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4. Insert the headphones into the headphone jack on EVK-MIMXRT1020 board.
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5. Either press the reset button on your board or launch the debugger in your IDE to begin running the demo.
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Running the demo
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================
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This following section shows how to run the demo:
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Notice, on EVK-MIMXRT1020 board, the audio record source is from two microphones. The left channel is from
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the headphone microphone, the right channel from the main microphone on board. It is OK for you to choose one
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of them or both.
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As the headphone microphone may have headphone standard differernt issue, you can just use main microphone
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on board as input source.
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Please note that the log print out may be different according to the different card,
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If the card doesn't been formatted ,the case will making new file system and below log will be printed,
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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SAI Peripheral Demo started!
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Please insert a card into board.
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Card inserted.
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Make file system......The time may be long if the card capacity is big.
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Create directory......
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Please choose the option :
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1. Record and playback at same time
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2. Playback sine wave
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3. Record to SDcard, after record playback it
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4. Quit
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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If the card is formatted already, the case will mount the file system only, the case will print below log,
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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SAI Peripheral Demo started!
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Please insert a card into board.
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Card inserted.
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Mount volume Successfully.
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Create directory......
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Please choose the option :
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1. Record and playback at same time
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2. Playback sine wave
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3. Record to SDcard, after record playback it
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4. Quit
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Note:
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To debug in qspiflash, following steps are needed:
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1. Select the flash target and compile.
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2. Set the SW8: 1 off 2 off 3 on 4 off, then power on the board and connect USB cable to J23.
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3. Start debugging in IDE.
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- Keil: Click "Download (F8)" to program the image to qspiflash first then clicking "Start/Stop Debug Session (Ctrl+F5)" to start debugging.
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